Write the sequence of mRNA in the 3' to 5' direction that would be synthesized from the following DNA sequence. 5' C-G-A-T-T-C 3'
A)G-C-T-A-A-G
B)G-A-A-U-C-G
C)G-C-U-A-A-G
D)G-A-A-T-C-G

Question

Write the sequence of mRNA in the 3' to 5' direction that would be synthesized from the following DNA sequence. 5'   C-G-A-T-T-C     3'
A)G-C-T-A-A-G
B)G-A-A-U-C-G
C)G-C-U-A-A-G
D)G-A-A-T-C-G

Quizplus · Accepted Answer

The mRNA is synthesized in the 5' to 3' direction, complementary and antiparallel to the DNA template strand. The DNA sequence provided is 5' to 3', so the mRNA synthesized from it (in the 5' to 3' direction) would be complementary to the DNA's 3' to 5' sequence. Therefore, the mRNA sequence in the 3' to 5' direction (opposite of synthesis direction) would be the reverse complement of the DNA sequence provided, with thymine (T) replaced by uracil (U) for RNA. The correct sequence is G-C-U-A-A-G.

Write the Sequence of MRNA in the 3' to 5